groups.lua
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groups.lua
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	--[[
	mattata v2.0 - Groups Plugin
	]]

	local plugin = {}
	plugin.name = 'groups'
	plugin.category = 'admin'
	plugin.description = 'List known groups the bot is in'
	plugin.commands = { 'groups' }
	plugin.help = '/groups [search] - Lists groups the bot is aware of.'
	plugin.group_only = false
	plugin.admin_only = false

	function plugin.on_message(api, message, ctx)
	local tools = require('telegram-bot-lua.tools')

	local search = message.args and message.args:lower() or nil
	local result
	if search then
	result = ctx.db.call('sp_search_groups', { '%' .. search .. '%' })
	else
	result = ctx.db.call('sp_list_groups', {})
	end

	if not result or #result == 0 then
	if search then
	return api.send_message(message.chat.id, 'No groups found matching that search.')
	end
	return api.send_message(message.chat.id, 'No groups found in the database.')
	end

	local output = '<b>Known groups'
	if search then
	output = output .. ' matching "' .. tools.escape_html(search) .. '"'
	end
	output = output .. ':</b>\n\n'

	for i, row in ipairs(result) do
	local title = tools.escape_html(row.title or 'Unknown')
	if row.username then
	output = output .. string.format('%d. <a href="https://t.me/%s">%s</a>\n', i, row.username, title)
	else
	output = output .. string.format('%d. %s (<code>%s</code>)\n', i, title, row.chat_id)
	end
	end

	if #result == 50 then
	output = output .. '\n<i>Showing first 50 results. Use /groups <search> to narrow down.</i>'
	end

	api.send_message(message.chat.id, output, { parse_mode = 'html' })
	end

	return plugin